Tone-regulator



G. A. FROST.

TONE RGULATOR.

APPLICATION FILED was. 1912 1,307,664. Patented J 11110 24, 1919 :zztgj.

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UNITED STATES PATENT OFFICE.

GEORGE ARNOLD FROST, OF SOUND BEACH. CGNNEC'I'IGU'I'.

TONE-REGULATOR.

Application filed August 6, 1918.

To all whom it may concern:

Be it known that I, Gnonon ARNOLD Fnos'r, a citizen of the UnitedStates, residing at Sound Beach, in the county of Fairficld and State ofConnecticut, have invented certain new and useful Improvements inTone-Regulators, of which the following is a specification.

This invention relates to talking machines and as its primary object,contemplates the provision of means for regulating or re stricting thevibrations of the reproducing diaphragm, to modify the volume of thesound reproduced and to eliminate harsh and discordant notes therefrom.

A still further object of the invention is to so construct the vibrationregulating or dampening device that the same may be in the form of anattaclnnent which can be conveniently attached to the sound box ofpractically any type of talking machine.

A still further object of the invention resides in the provision of anadjustable damper which can be readily moved into engagement with thereproducing diaphragm during the operation of the talking ma chine. tomodify the sound being reproduced without danger of causing stoppage ofthe machine.

Other objects of the invention as well as the specific construction andarrangement of the various elements thereof will be more readilyunderstood from the following descriptlon and accompanying drawings inwhich Figure 1 is a front elevation of a sound box having my inventionapplied thereto.

Fig. 2 is a vertical sectional view of the device in applied position,and

Fig. 3 is a fragmentary plan view of the body portion or clamping plate.

In the present drawings I have shown certain elements of a talkingmachine, such as the sound box 1. the reproducing diaphragm 2, and thestylus arm 3. These parts, as will be readily recognized from thedrawings, are all of conventional form and have no relation to thepresent invention other than to show the application thereof.

The dampening or regulating device is preferably in the form of aremovable attachment and to this end consists of a suitable body portionor clamping plate 4 hav ing the opposite ends thereof bent at rightangles to provide clamping arms 5 and 6 Specification of Letters Patent.

Patented June 24', 1919.

Serial No. 248,591.

for engagement with opposite edge portions of the sound boxsubstantially as shown in Fig. 2. One of these clamping arms is extended as indicated at 7 to provide a finger piece to facilitate removalof the clamp. Intermediate the arms 5 and (i the center portion of theclamping plate is directed outwardly to provide a bridge member 9 fromthe outer face of which extends an externally threaded collar 9. Thiscollar 9 surrounds the opening 10 formed in the clamping plate for thereception of the slidin damper member 11. This damper 11 is sustantially cylindrical in cross section and is equipped at its inner endwith an outwardly directed flange 12 which is engageable with thediaphragn'i 2 and for this reason is provided with a covering pad 13 ofany suitable material. such as chamois, or the like. The outer end ofthis damper 11 is also equipped with an outwardly directed flange 14provided with one or more radial projections 15 fitting into suitablegrooves 16 formed in the collar 9 to prevent rotary movement of thedamper. A coil spring 17 confined beneath the collar 14 and the adjacentface of the plate 4 normally serves to retain the damper 11 out ofengagement with the diaphragm 2.

A screw cap 18 is threaded upon the collar 9 and is adapted to engagethe flange 14 of the damper to force this flange inwardly against thetension of the spring 17 thus bringing the inner flanged end of thedamper into engagement with the diaphragm 2 to regulate or lessen thevibrations of the diaphragm. thus decreasing the volume of the soundreproduced and eliminating harsh and discordant notes therefrol'n.

The foregoing description and accompanying drawings have reference towhat might be considered to be the preferred or approved form of myinvention. I desire it to be understood that I may make such changes inconstruction, combination and arrangement of parts, materials.dimensions, et eetera, as may prove expedient and fall Within the scopeof the appended claims.

Having thus fully described my invention what I claim as new and desireto secure by Letter Patent, is:

1. A- device of the character described comprising a clamping plate, aslidable d amper carried by said plate. a spring engaging said plate andbearing upon said damper for urging the damper in one direction, andmeans for limiting the movement of said damper in such direction.

2. A device of the character described com irising a supporting plate,having a coi lar thereon, a slidahle damper passing through said plate,a spring bearing upon said plate and engaging the damper for forcing thedamper in one direction, and a cap fitting over the outer end of saiddamper and connected to said collar for limiting the movement of saiddamper in one direction.

3. A device of the character described comprising a supportin platehaving an opening, a collar carrier by said plate adjacent said opening,a damper extending through said opening a flange formed on. the outerend of said damper, a coiled spring surrounding said damper and bearinupon said plate and upon said flange for orcing said damper outwardly,said collar having grooves upon the inner surface thereof, radialprojections formed on said flange and fitting within said grooves, thusholding the damper against rotation, and a cap fitting over said damperand being screwed into engagement with said collar, thus limiting thedamper against outward movement and also regulating the normal extent ofinward movement of the damper, although the damper is yieldablysupported by said sprin 4. A device of the character describedcomprising a clamping late, a slidable damper carried by said plate, aspring carried by said damper and engaging said plate for forcing thedamper in one direction, and adj ustable means for limiting the movementof said damper in such direction.

5. A device of the character described comprising a clamping plate, aslidable damper carried by said plate, a spring engaging said plate andbearing upon said damper for forcing the damper in one direction, and anadjustable cap connected to said plate for limiting the movement of saiddamper in such direction.

6. A device of the character described comprising a supporting platehaving a collar thereon, a slidab-le damper passing through said plate,a sprin bearing upon said plate and engaging t e damper for forcing thedamper in one direction, and means adjustably connected to the collarand fitting over the outer end of said damper for limiting the movementof said damper in one direction.

7. A device of the character described comprising a supporting platehaving an opening, a collar carried by said plate adjacent said opening,a damper extending through said opening, a flange formed on the outerend of said damper, and a roil spring surrounding said damper andbearing upon said plate and upon said flange l'or forcing said damperoutwardly, said collar harin grooves upon the inner surface thereof, ratial projections formed on said flange and fitting within said grooves,thus holding the damper against rotation, and adjustable means fittingover said damper and engaging said collar, thus limiting the outwardmovement of the damper, and also regulating the normal extent of inwardmovement of the damper although the damper is yield ably supported bysaid spring.

A device oi the character described comprising a supporting plate havingan opening, a collar carried by said plate adjacent said opening, adamper extending through said UPQl'llIlg, a flange formed on the outerend of said damper, a coiled sprlng surrounding said damper and bearinupon said plate and upon said flange for orcing said damper outwardly,means for holding said damper against rotation within said collar, and acap fitting over said damper and being screwed into engagement with saidcollar, thus limiting the outward movement of the damper and alsoregulating the inward movement of the damper although the damper isyieldingly supported by said spring.

9. A. device of the character described comprising a supporting platehaving an opening, a collar carried by said plate adjacent said opening,a damper being slidably mounted through said opening, a flange formed onthe outer end of said damper, a coiled spring surrounding said openinand bearing upon said plate and upon said ange for forcing said damperoutwardly, means for holding said damper against rotation Within saidcollar and means adj ustably connected to said collar and engaging saiddamper for limitin the outward movement of the damper an also regulatingthe normal extent of inward movement thereof, al-

though the damper is yieldably supported by said frame.

In testimony whereof I aflix my signature in presence of two Witnesses.

GEORGE ARNOLD FROST.

Witnesses:

HARRY C. F Ros'r, LEONOR E. LESSER.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, D. 0.

